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1913 ~ Canary-shouldered Thorn ~ Ennomos alniaria
UK Status

Resident. Common

Montgomeryshire Status

A common species, found throughout the county.

Wingspan :  M & F, 38-42mm.

Confusion species

September Thorn, August Thorn.

Flight time (Montgomeryshire)


Woodland, hedgerows, parkland, gardens and scrub.


Oak, beech, lime and birch.

Lifestage data

Overwinters as an egg on the foodplant. Larva early May-July. Pupates amongst the debris around the foodplant, occasionally attached to the foodplant.
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Montgomeryshire photos

Photo by MDH, 27th Aug 2009, Llanfyllin

Photo by MDH, 22nd Aug 2008, Llanfyllin